ProSoft Technology PLX3x Series, Руководство пользователя

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PLX3x Series ♦ Multi-Protocol Gateways PND Protocol
User Manual
ProSoft Technology, Inc. Page 207 of 215
January 25, 2018
10.5 PND Performance
The following tables contain PND performance rates.
EIP Class 1
Connections
RPI (ms) Number of EIP Class 1
Connections
1 2 3 4 5 6 7 8
2 128 Bytes 128 Bytes 128 Bytes 128 Bytes 128 Bytes 128 Bytes 128 Bytes 128 Bytes
256 Bytes 256 Bytes 256 Bytes 256 Bytes 256 Bytes 256 Bytes NA NA
496 Bytes 496 Bytes 496 Bytes NA NA NA NA NA
4 128 Bytes 128 Bytes 128 Bytes 128 Bytes 128 Bytes 128 Bytes 128 Bytes 128 Bytes
256 Bytes 256 Bytes 256 Bytes 256 Bytes 256 Bytes 256 Bytes NA NA
496 Bytes 496 Bytes 496 Bytes NA NA NA NA NA
8 128 Bytes 128 Bytes 128 Bytes 128 Bytes 128 Bytes 128 Bytes 128 Bytes 128 Bytes
256 Bytes 256 Bytes 256 Bytes 256 Bytes 256 Bytes 256 Bytes NA NA
496 Bytes 496 Bytes 496 Bytes NA NA NA NA NA
PROFINET
Update Rate
(ms) PROFINET I/O Size (bytes)
128 256 512 768 1024 1280 1400
2*
YES NO NO NO NO NO NO
4*
YES YES YES NO NO NO NO
8
YES YES YES YES YES YES YES
Example:
PLX3x gateway sending/receiving 128 bytes of EIP data on a single 4 ms Class
1 connection and PLX3x gateway sending/receiver 128 bytes of PROFINET data
with a 4 ms update rate.
The maximum cycle time is calculated as:
EIP = 4 ms/in + 4 ms/out = 8 ms
PND = 4 ms/in + 4 ms/out = 8 ms
PLX3x latency = 4 ms
Total: 20 ms

To use a 2 to 4 ms update rate, you must use a different GSDML file. This
GSDML is available at www.prosoft-technology.com

Under certain conditions (high network load, low update rate, etc.) the
PROFINET Controller may need to raise the watchdog time.